LinearViscoelasticStressUpdate.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#pragma once

#include "StressUpdateBase.h"
#include "LinearViscoelasticityBase.h"

class LinearViscoelasticStressUpdate : public StressUpdateBase
{
public:
  static InputParameters validParams();

  LinearViscoelasticStressUpdate(const InputParameters & parameters);

  using StressUpdateBase::updateState;

  virtual void updateState(RankTwoTensor & strain_increment,
                           RankTwoTensor & inelastic_strain_increment,
                           const RankTwoTensor & rotation_increment,
                           RankTwoTensor & stress_new,
                           const RankTwoTensor & stress_old,
                           const RankFourTensor & elasticity_tensor,
                           const RankTwoTensor & elastic_strain_old,
                           bool compute_full_tangent_operator,
                           RankFourTensor & tangent_operator) override;

  virtual void propagateQpStatefulProperties() override;

  virtual bool requiresIsotropicTensor() override { return false; }

protected:
  virtual void initQpStatefulProperties() override;

  MaterialProperty<RankTwoTensor> & _creep_strain;
  const MaterialProperty<RankTwoTensor> & _creep_strain_old;

  const MaterialProperty<RankTwoTensor> & _apparent_creep_strain;
  const MaterialProperty<RankFourTensor> & _apparent_elasticity_tensor;
  const MaterialProperty<RankFourTensor> & _elasticity_tensor_inv;
};